There's no commission but their performance is tracked by management.I took a lady friend to buy a computer at best buy, For $729 you can get a realy good desktop, I told her going in that any extra warranty was not necessary and she should say no, but when we were in the store she was having trouble saying no to the pimple faced clerk. I had to step in and say no to the extra warranty. He just kept on explaining away and she kept asking me, are you sure, are you sure, Finally I had to say, NO EXTRA WARRANTY,IT NEVER PAYS YOU BACK The little pecker was so steamed that he even refused to push the cart with the computer CPU, screen, and printer to the front door for us like they usually do. If they are not on commission, then I am sure they are on some sort of point system.
I'm pretty sure this is no longer practiced. But here's a peek behind the curtain -- http://www.cabel.name/2006/02/retail-secrets-best-buy-wall-numbers.html